#include <bits/stdc++.h>
using namespace std;


int main(){
#ifdef FUCK
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
    int start=clock();
#endif


#ifdef FUCK
    int end=clock();
    double p=(double)(end-start)/CLOCKS_PER_SEC;
    cout << "运行时间为 : "<<p*1000 <<" ms"<<endl;
#endif
    return 0;
}
